package collection;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

public class CollectionDemo2 {
    public static void main(String[] args) {
        Collection c = new ArrayList<>();
//        Collection c = new HashSet<>();
        c.add(new Point(1,2));
        c.add(new Point(3,4));
        c.add(new Point(5,6));
        c.add(new Point(7,8));
        c.add(new Point(9,0));
        boolean b = c.add(new Point(1,2));
        System.out.println(b);
        System.out.println(c);

        Point p = new Point(1,2);
        boolean contains = c.contains(p);
        System.out.println("是否包含："+contains);

        boolean remove = c.remove(p);
        System.out.println("是否删除:"+remove);
        System.out.println(c);


    }
}
